干旱区研究2012，Vol.29Issue(4)：604-608,5.
乌兰布和沙漠东北部沙区人工林土壤肥力质量评价
Assessment on Soil Fertility of Planted Forests in the Northeast Sandy Area of the Ulanbuh Desert
摘要
Abstract
In this study, the effect of vegetation on soil fertility was researched so as to guide the local vegetation construction. Nine pieces of planted forest in the northeast sandy area of the Ulanbuh Desert were taken as the study area, and 16 indicators of soil physical, chemical and biological properties were selected through the sensitivity analysis and principal component analysis to derive the integrated fertility index （I_IF） calculated with the fuzzy comprehensive evaluation approach. The content of physical clay 〈 0.01 mm, degree of aggregation, organic mat- ter content, total N content, bacterial population and urease activity were selected as the soil fertility indicators, which could reflect the most information of soil fertility, and the coefficient of determination was 0. 940 5. Holisti- cally, the value of soil fertility was in an order of shrubbery 〉 woodland 〉 sandy land, shrubbery could improve soil, and It~ of Caragana korshinskii was the highest. Therefore, the native nitrogen-fixing shrubs should be consid- ered as the dominant planted species, and some tree and herb species should also be selected, however, it is not suitable to plant trees in large area.关键词
人工林/土壤肥力/主成分分析/模糊综合评判法/乌兰布和沙漠Key words
planted forests/soil fertility/principal component analysis/fuzzy comprehensive evaluation ap-proach/Ulanbuh Desert分类
农业科技引用本文复制引用
杨晓娟,廖超英,孙文艳,包耀贤,李陆平..乌兰布和沙漠东北部沙区人工林土壤肥力质量评价[J].干旱区研究,2012,29(4):604-608,5.基金项目
中国林业科学研究院基本科研业务费专项资金资助项目 （）
